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Characterising the impact of post-treatment storage on chemistry and antimicrobial properties of plasma treated water derived from microwave and DBD sources

Niquet, Rijana; Boehm, Daniela; Schnabel, Uta; Cullen, P.J.; Bourke, Paula; Ehlbeck, Jörg

Authors

Rijana Niquet

Daniela Boehm

Uta Schnabel

P.J. Cullen Patrick.Cullen@nottingham.ac.uk

Paula Bourke

Jörg Ehlbeck



Abstract

The biological effects of atmospheric cold plasma generated reactive species are mediated through and at a liquid interface. The diversity of antimicrobial efficacy or intensity of effects may differ with respect to the plasma device or set up, and it is important to understand how these differences occur to advance understanding and successful applications. Thus, plasma treated water (PTW) from a microwave driven plasma source (PTW-MW) and plasma treated water from a di-electric barrier discharge system (PTW-DBD) were compared in terms of long lived reactive species chemical composition and antimicrobial activity. The influence of a post-treatment storage time (PTST), where reactive species in the gas phase were maintained in contact with the liquid was investigated. Nitrogen-based chemistry dominated in PTW-MW, with high concentrations of nitrous acid decomposing to nitrite and nitrate, while H2O2 and nitrate were predominant in PTW-DBD. PTST could enhance H2O2 concentrations in di-electric barrier PTW over time while nitrous acid, the main oxidative species in microwave driven PTW, decreased. This work highlights that plasma treated water presents a resource comprising a range of different compounds, stabilities and reactivities which may be tunable to specific applications.

Journal Article Type Article
Journal Plasma Processes and Polymers
Print ISSN 1612-8850
Electronic ISSN 1612-8869
Publisher Wiley-VCH Verlag
Peer Reviewed Peer Reviewed
APA6 Citation Niquet, R., Boehm, D., Schnabel, U., Cullen, P., Bourke, P., & Ehlbeck, J. (in press). Characterising the impact of post-treatment storage on chemistry and antimicrobial properties of plasma treated water derived from microwave and DBD sources. Plasma Processes and Polymers, doi:10.1002/ppap.201700127
DOI https://doi.org/10.1002/ppap.201700127
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/ppap.201700127/full
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This is the peer reviewed version of the following article: Niquet R, Boehm D, Schnabel U, Cullen P, Bourke P, Ehlbeck J. Characterising the impact of post-treatment storage on chemistry and antimicrobial properties of plasma treated water derived from microwave and DBD sources. Plasma Process Polym. 2017;e1700127, https://doi.org/10.1002/ppap.201700127 , which has been published in final form at http://onlinelibrary.wi...02/ppap.201700127/full. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving

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PTW manuscript.pdf (480 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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